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Double Resonance Techniques: Overview01:12

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Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Dynamic coupling of plasmonic resonators.

Suyeon Lee1, Q-Han Park1

  • 1Department of Physics, Korea University, Seoul 136-701, Korea.

Scientific Reports
|February 26, 2016
PubMed
Summary
This summary is machine-generated.

We developed a simple analytic model to describe dynamic coupling in plasmonic resonators. This model explains coupled resonator modes and reveals the origin of plasmonic electromagnetically induced transparency.

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Area of Science:

  • * Physics and Applied Sciences
  • * Nanotechnology and Plasmonics

Background:

  • * Plasmonic resonators, like subwavelength holes in metal films, exhibit complex coupling behaviors.
  • * Understanding this dynamic coupling is crucial for designing advanced plasmonic devices.

Purpose of the Study:

  • * To clarify the nature of dynamic coupling in plasmonic resonators.
  • * To determine the dynamic coupling coefficient using a simple analytic model.
  • * To provide a quantitative description of coupled resonator modes and the phenomenon of plasmonic electromagnetically induced transparency.

Main Methods:

  • * Development of a simple analytic model based on the retarded interaction of oscillating screened charges.
  • * Quantitative analysis of fundamental symmetric and anti-symmetric modes in coupled resonators.
  • * Rigorous numerical calculations and experimental validation.

Main Results:

  • * The dynamic coupling coefficient was determined using the analytic model.
  • * The model accurately describes the symmetric and anti-symmetric modes of coupled resonators, aligning with experimental data.
  • * Plasmonic electromagnetically induced transparency was shown to arise in coupled resonators of slightly unequal lengths.

Conclusions:

  • * The developed analytic model provides a fundamental understanding of dynamic coupling in plasmonic resonators.
  • * The model successfully explains coupled resonator modes and the emergence of plasmonic electromagnetically induced transparency.
  • * Findings are validated through numerical simulations and experimental results, paving the way for improved plasmonic device design.